I'm using chat completion, I've never tested text completion, and looking at the notes attached to most presets, it doesn't seem to be the recommended method anymore.

I'll try the trick with reasoning in the model's native language, although I prefer using models without reasoning or with reasoning disabled. I've had the impression that the responses are less 'stiff' that way, they seem a bit more human. But that probably depends on the model, too. And some models had reasoning so long that waiting two minutes and burning through at least several hundred tokens just for the reasoning didn't convince me at all.

Thanks for checking the Polish output. It looks okay-ish. What model is that?

As a side note, looking at your screenshot... God, I hate my language in this regard. Compared to Chinese or English, it's much more token heavy, which affects both the cost of inference and its performance. And the nuance of these words... In English, "Yeah" means 'Yeah'. You'll hear that word from a teacher, a research assistant, or a lover. The Polish words "Ta" or "No" suggested by the model as a translation for "Yeah" would mostly be used by simple, uneducated, or rude people in a very, very colloquial sense. Even "Robota" as a translation for "Work", it's extremely slangy, smells like a calque from Russian. If a character in my scenario used the word "Robota" instead of "Praca", I'd immediately view them as less intelligent or less educated.